Refraction is the deflection and propagation of light from one medium to another. In our body this happens when light penetrates our eyes, allowing us to see properly. Refractive errors cause refraction to deviate from the focal point (focal point that should fall on the retina) so that we cannot see perfectly, and that is where refractive surgery comes in.
The procedure uses very modern technology, employing a LASER to treat and reshape the cornea, correcting the degree that the patient presents. There are two main types of surgery: LASIK and PRK. The decision on the best technique for each case is made according to the characteristics of each patient’s eye. The detailed study of the patient’s cornea through exams that allow the assessment of its curvature and thickness is carried out by modern equipment, mainly corneal tomography.
In PRK, the laser is applied directly to the cornea, after removing its most superficial layer (epithelium). In LASIK, a flap is created in the cornea, which is raised and then the laser is applied. The flap is repositioned to its original position without the need for stitches.
The surgery is extremely effective, painless, and anesthesia is done with just a few drops of eye drops. Usually, patients feel only a slight sensation of sand in their eyes, but nothing that cannot be worked around.
Visual rehabilitation which helps reduce under-eye bags (ลด ถุง ใต้ ตา which is the term in Thai) is also very fast, and in a few days after the procedure, the person can return to normal activities, according to the ophthalmologist’s instructions. Most patients already achieve gains in visual ability soon after surgery, but generally the results appear definitively after two or three weeks.
Like any other procedure, refractive surgery also has risks, but they are quite rare, mainly due to the advancement of the technologies used.
If you can’t adapt to wearing an eyeglass and contact lens, see a reputable ophthalmologist and get informed. Refractive surgery can be a great chance for you to permanently improve your quality of life.
